1.Overview

ZCS-300 is the STM-1 level multi-service Synchronous Digital Hierarchy (SDH) transmission system compatible with ITU-T standard. It is designed as a modular system with two 155.520Mb/s optical interfaces to provide 63 E1 and Engineering Order Wire card (EOW). It can be used as a Terminal Multiplexer (TM) or an Add-Drop-Multiplexer (ADM) to build point-to-point, ring and chain transmission network.

2.Feature

• STM-1 interface：
• Number of ports: 2 (1+1 APS, Recovering time: <50ms);
• Date rate：155.520Mbit/s;
• Connector: SFP slot, Hot pluggable, Optical or Electrical Optional;
• Clock:
• Internal timing.
• STM-1 line timing.
• Tributary timing from E1-1 to E1-63.
• External timing source input.
• External timing output.
• The timing source can be auto-switched according to SSM or operator settings.
• Supports ALS (Automatic Leaser Shutdown).
• Supports RPD (Remote Power down Detection).
• Supports optical line loop and device loop.
  
• Compliance: ITU-T G.957, G.841, G.813, G.707,G.825.
• E1 interface：
• Number of ports: 63.
• Date rate：2.048Mbit/s.
• Line code: HDB3.
• Line Impedance:
• 120Ω, balanced.
• 75Ω, unbalanced.
• Connector:
• RJ-45, balanced (via adapter cable).
• BNC, unbalanced (via adapter cable).
• Compliance:ITU-T G.703, G.704, G.823.
• System Interface：
• RS232 user channel interface: RS232.
• External synchronization interface / Extendable management interface : ETS1/EXM1, ETS2/EXM2.
• EOW interface: PHONE.
• UALM and DALM output interface: U/DALMO.
• NE Management：
• CLI: Local management is performed via an CLI terminal.
• SNMP: Compatible with V1 and V2C protocol. Access is available using SNMP management software "Smartview".
• LED indication: Necessary alarm indications such as NOP, LOF, RPD.
• Download online: Supports FTP protocol and firmware download online without disturbance of existing traffic.

3.Technical Specification

• Power supply：
• AC+DC dual input optional.
• AC range: 85～264V AC
• DC range : -36V ～-72V DC
• Power consumption: 20W(±10％)
• Support Redundancy Power Supply Protection.
• Physical：
• Height: 43.7 mm (1U).
• Width: 434 mm (19 in).
• Depth: 255 mm.
• Weight: 4.5 Kg.
• Operating environment：
• Temperature: -5~55-deg centigrade.
• Storage Temperature: -40~70-deg centigrade.
• Relative Humidity: <95% non-condensing.

4.Application

ZCS-300 can be used to build point-to-point, ring and chain network, as the following figure shows:

.

Figure.1-4-1 Point-to-Point Application

Figure.1-4-2 Point-to-Multi-Point Application

5.Order Information

ZCS-300AD : 63E1 SDH Optical Multiplexer, 63E1 75/120Ω, 2XSTM-1 intefaces, SNMP Managed, 1U 19”Size Rackable Unit, 220VAC+-48DC Dual Power Supply Redundancy